Introduction to Living Things

Topic 1 Living Organisms

Terms used to describe the characteristics of Living things

Terms used to describe the characteristics of Living things

Multiple Choice

Which is not a definitive characteristic of a living thing

• Movement

• Growth

• Appearance

• Excretion

Multiple Choice

Who disproved the theory of Spontaneous Generation

• Leonardo DiVinci

• Issac Newton

• Einstein

• Francesco Redi

Amoeba

• move by using bulging parts called pseudopodia

• The term means “false feet.”

• These are extensions of the cell's membrane.

• An amoeba can reach out and grab some surface with a pseudopod, using it to crawl forward

Euglena

• move by a flagellum (plural ‚ flagella)

• is a long whip-like structure that acts like a little motor.

• The flagellum is located on the anterior (front) end

• twirls in such a way as to pull the cell through the water.

  
  

  
  

Paramecium

• their bodies are covered in cilia, or short hairy protrusions

• Cilia are essential for movement of paramecia

• As these structures whip back and forth in an aquatic environment

• they propel the organism through its surroundings

Chlamydomonas

• moves by beating its two flagella

•  It can be found in fresh water environments around the world

• It can sense light through a red eye spot and can react to it, a behavior called phototaxis

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Multiple Choice

Which of the following is NOT a cell structure used for locomotion by unicellular organisms?

• cell wall

• flagellum

• pseudopod

• cilium

Multiple Choice

Which best explains how a single-celled organism can survive without other cells?

• They do not need to perform more than one function to survive.

• They do not need any substance from outside of the cell.

• They are able to perform all necessary functions within one cell.

Multiple Choice

Which best describes a single-celled organism?

• a small group of organisms

• a small organism with a variety of parts

• an organism that is able to carry out all its life processes

• an organism that relies on other organisms to survive

Multiple Choice

Logan is comparing the characteristics of different types of organisms. Which best describes a difference between insects and bacteria?

• Insects are made of one cell, while bacteria are made of many cells.

• Bacteria are made of one cell, while insects are made of many cells.

• Insects require energy to perform life functions while bacteria do not.

• Bacteria require energy to perform life functions while insects do not.